FastLee
Member
Wild E. Coyote said:Passing finger at top and feeling something is normal. That is the TDC area where piston stops and starts going down again. That will be the burned oil. Clean it with something soft (a rag!). Clean the bores but don't scratch them. Just use compressed air and some degreaser and then try again. From experience, nikasil bores are very hard and you should see the honing marks on them.
To be able to do that, you should dismantle the bottom end. Regarding the parts needed for the overhaul there are options, but not from Ford.
I would just warn you about the set of piston rings on ebay advertised as for puma. They are not for puma, but for honda accord A18 engine. The first compression ring on that set is Chromed and I had my doubts about it so I sent email to Mahle since they invented nikasil and here is their response C/P:
'Hello Mr. Tkalcevic,
thank you for your email and your interest for our MAHLE products.
In this case you could take any piston ring, but no ring with the coating: Chrom !
That mean - Nikasil is a very hard coating, so you could'nt use also any "hard - strong ring coating" !
Nevertheless for your Puma engine we have no information about piston -, liner - and ring material - coating.
Mit freundlichen Grüßen / Kind regards
Peter Gann
MAHLE Aftermarket GmbH
Product Management Engine Systems and Components (MDE)'
There is work around that setback explained on other threads on this forum.
Thank you for your reply.
I already saw that thread about the rings. I wrote down the references from the NPR Europe ones for my reference. Very helpful info. Thanks a lot.
Will check better the wear of the liners asap. But as i don't know the mileage of the car (it has at least 165 000 kms, but may be 265 000) i am affraid that the wear may be a little bit more than just burned oil.
I am still looking for a replacement engine to put in the car while this one is refurbished.